Free EMC D-DS-FN-23 Exam Dumps Questions & Answers

What are the two data categories that represent qualitative data?

• A.Nominal and ratio
• B.Ratio and interval
• C.Nominal and ordinal
• D.Ordinal and interval

You are assigned the task of creating customer profiles for your company. In your database, you have
25 key input variables that come together to define 2,500 customers. You decide to run a K-means cluster analysis on the 25 input variables based on k=4 to build your profiles.
Your analysis resulted in four cluster populations:
Cluster A=1,000 customers
Cluster B=560 customers
Cluster C=925 customers
Cluster D=15 customers
What should be attempted first to more evenly distribute the customer population across clusters?

• A.Remove some of the input variables from the analysis
• B.Increase K from 4 to 5
• C.Reduce K from 4 to 3
• D.Remove the 15 customers in Cluster D from the population

During the data preparation phase, you notice a high correlation between average spend on video games, age of players, and number of science fiction shows watched.
Which technique could you use to address the three correlated variables?

• A.Square the three variables to remove the correlation
• B.Use scaling to make the three variables equivalent in size
• C.Combine the three variables into one new variable
• D.Drop the three variables to improve the model

You have been assigned to run a logistic regression model for each of 100 countries, and all the data is currently stored in a PostgreSQL database.
Which tool/library would you use to produce these models with the least effort?

• A.RStudio
• B.Mahout
• C.HBase
• D.MADlib

Which type of numeric value does a logistic regression model estimate?

• A.Any real number
• B.Any integer
• C.A p-value
• D.Probability